Method and device for capacitive sensing

Abstract

This invention discloses a capacitive sensing device. The device includes a plurality of first conductive lines electrically isolated from each other; a plurality of second conductive lines electrically isolated from each other and electrically isolated from and stacked with the first conductive lines to form a plurality of intersecting points; and a plurality of electrical conductors electrically isolated from each other and correspondingly crossing the first and the second conductive lines and being around the intersecting points, wherein the first and second conductive lines and the electrical conductors are electrically isolated from each other. By doing so, when an electrical signal is driven to any first conductive line, the first conductive line is capacitively coupled to the second conductive lines with which it intersects, and the electrical conductors crossing the first conductive line are respectively capacitively coupled to the first conductive line and the second conductive lines which intersect with the first conductive line to provide a higher compound capacitance.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a touch device and method, and more particularly, to a capacitive sensing device and method.[0003]2. Description of the Prior Art[0004]Referring to FIG. 1, a diagram depicting a prior-art capacitive sensing device with multi-touch operations and a capacitance image is shown. A touch panel 110 has a plurality of first conductive lines 112 and a plurality of second conductive lines 114. The first and second conductive lines are perpendicularly stacked on and electrically isolated from each other. When a sensing signal (not shown) is input to one of the first conductive lines 112, it creates a plurality of capacitive coupling with all of the second conductive lines at intersecting points, thereby determining the electrical characteristics of the intersecting points based on the current or voltage on all of the second conductive lines. Each of the first conductive lines 112 are sequentially ...

AI Technical Summary

Benefits of technology

The present invention is a capacitive sensing device and method that includes a plurality of first and second conductive lines that are electrically isolated from each other and intersect at a plurality of intersecting points. The device also includes a plurality of electrical conductors that are electrically isolated from each other and positioned above the first and second conductive lines. The first and second conductive lines are electrically isolated from each other and from the electrical conductors, and the first and second sensing signals include compound values of capacitive coupling between the first and second conductive lines before and after coupling. The device can be used to detect touch or objects in a capacitive sensing method. The technical effects of the invention include improved sensing accuracy and efficiency, as well as reduced interference between the conductive lines.

Problems solved by technology

However, the magnitudes of d1˜d4 are too small to make use, and sensing can be easily affected by noises, thus multi-touch operations are often mistakenly determined.

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